The IP Code, International Protection Marking, IEC standard 60529, sometimes interpreted as Ingress
Protection Marking, classifies and rates the degree of protection provided against intrusion (body parts
such as hands and fingers), dust, accidental contact, and water by mechanical casings and electrical
First digit: Solid particle protection
No special protection
Any large surface of the body, such as the back of a hand, but no protection against deliberate contact with
a body part; from solid objects greater than 50mm in diameter
Fingers or similar objects (Effective against >12.5 mm)
Tools, thick wires, etc. (Effective against >2.5 mm)
Most wires, slender screws, large ants etc. (Effective against >1 mm)
Ingress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the
satisfactory operation of the equipment.
No ingress of dust; complete protection against contact (dust tight).
Second digit: Liquid ingress protection
No special protection
Protected against dripping water. Dripping water (vertically falling drops) shall have no harmful effect on the
specimen when mounted in an upright position onto a turntable and rotated at 1 RPM.
Protected against dripping water when tilted at 15°.Vertically dripping water shall have no harmful effect
when the enclosure is tilted at an angle of 15° from its normal position. A total of four positions are tested
within two axes.
Protected against spraying water
Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect, utilizing either:
a) an oscillating fixture, or b) A spray nozzle with a counterbalanced shield.
Test a) is conducted for 5 minutes, then repeated with the specimen rotated horizontally by 90° for the
second 5-minute test. Test b) is conducted (with shield in place) for 5 minutes minimum.
Protected against splashing of water
Water splashing against the enclosure from any direction shall have no harmful effect, utilizing either: a) an
oscillating fixture, or b) A spray nozzle with no shield.
Test a) is conducted for 10 minutes. Test b) is conducted (without shield) for 5 minutes minimum.
Protected against water jets
Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects.
Protected against powerful water jets
Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no
Protected against immersion, up to 1 m depth
Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under
defined conditions of pressure and time (up to 1 m of submersion).
Protected against immersion, 1 m or more depth
The equipment is suitable for continuous immersion in water under conditions which shall be specified by
the manufacturer. However, with certain types of equipment, it can mean that water can enter but only in
such a manner that it produces no harmful effects. The test depth and duration is expected to be greater
than the requirements for IPx7, and other environmental effects may be added, such as temperature cycling
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